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EP3224841B1 - Transformateur à haute tension avec noyau en forme de u - Google Patents

Transformateur à haute tension avec noyau en forme de u Download PDF

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Publication number
EP3224841B1
EP3224841B1 EP15747469.3A EP15747469A EP3224841B1 EP 3224841 B1 EP3224841 B1 EP 3224841B1 EP 15747469 A EP15747469 A EP 15747469A EP 3224841 B1 EP3224841 B1 EP 3224841B1
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EP
European Patent Office
Prior art keywords
leg
voltage transformer
core
less
winding
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Application number
EP15747469.3A
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German (de)
English (en)
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EP3224841A1 (fr
Inventor
Roman Schichl
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Sumida Components and Modules GmbH
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Sumida Components and Modules GmbH
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Publication of EP3224841A1 publication Critical patent/EP3224841A1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/255—Magnetic cores made from particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/08—High-leakage transformers or inductances
    • H01F38/10—Ballasts, e.g. for discharge lamps

Definitions

  • the present invention relates generally to inductive components and, in particular, to transformers with a small overall volume that are designed for a high output voltage.
  • the size of the electronic components provided for the power supply must also be suitably adapted.
  • increasingly powerful gas discharge lamps can be made available in the field of lighting technology, which offer a constant or even higher output with a smaller construction volume compared to the lamps used up to now.
  • the small overall volume of these illuminants also means that the electronic components required to control the illuminants have to be reduced in size.
  • inductive components and, above all, transformers have to be developed taking into account numerous parameters that influence the performance, since a suitable adaptation of an inductive component depends on numerous factors, such as the shape of the magnetic core, the type of ferrite material used, and the routing of cables in the windings , as well as the circuit topology in general.
  • a reduction in the size of the components is sought in many areas of electronics, in particular achieving a sufficiently high power density for specially selected component dimensions for inductive components is associated with a great deal of effort, since numerous physical boundary conditions predetermined by the properties of the magnetic materials must be observed, so that Different solution approaches can lead to different end results, which then may not behave in the same way in the target application.
  • a high operating voltage is required at least in certain operating phases, so that in addition to the difficulties that have to be overcome due to a desired compact design, other problems that result from the high operating voltage must also be taken into account.
  • An example of the use of small, powerful transformers that have to deliver a high output voltage is in connection with certain light sources, such as xenon lights, and the like, since here a relatively high voltage of up to 30 kV is required at least to ignite the lamp.
  • a small volume and a low weight are essential aspects for a high-voltage transformer, great importance must be attached to a high dielectric strength and reliability of the transformer under many different environmental conditions.
  • ferrite cores are available in many standard sizes and with many standard ferrite materials, but in the size range of cores with a magnetic effective volume of about 2000 mm 3 or less, the required component properties with a closed core geometry, for example a relatively compact design with good thermal behavior and offers relatively low susceptibility to failure, may not be able to be achieved in order to provide sufficient power with a desired compact structure of the transformer. That is to say, a linear core shape is often used for transformers in order to achieve compact dimensions at least in one dimension, a magnetic structure with somewhat lower efficiency compared to transformers with an almost closed magnetic circuit being accepted.
  • toroidal cores or other closed magnetic systems are often incompatible with regard to the available structural volume, especially in critical applications, for example Mobile devices, automobiles, and the like.
  • a linear configuration of the magnetic core material has therefore proven to be suitable in practice for small high-voltage transformers that can be used, for example, for discharge lamps, measuring devices and the like, due to the small dimensions that can be achieved perpendicular to the linear extension of the transformer.
  • the applicant has succeeded in developing a small transformer for high voltage based on a core geometry in the shape of a mushroom, that is, a linear rod core with end plates at each end of the rod, with a primary winding with 2 turns, which significantly reduces the overall volume with almost square Dimensions, but otherwise provides the properties previously required.
  • the mushroom structure of the core material results in a certain amount of effort in the manufacture of the small transformer, for example with regard to the manufacture of the core, the sintering of the core material, etc., so that despite the already achieved low volume and the associated favorable properties, there is still a need for further improvements.
  • a small transformer for high voltages with a primary winding with only 2 turns is generally advantageous for reducing the overall construction volume, since the number of secondary turns in the secondary winding can also be reduced due to the lower number of primary turns, but may require other measures to achieve the desired electronic To comply with properties, such as the implementation of the shortest possible connection lines.
  • the design and development of inductive components for high voltages with small dimensions is a complex task in which many parameters have to be taken into account that influence each other.
  • an inductive component also has a capacitive component and a parasitic ohmic resistance, so that the entire vibration behavior of the transformer must be taken into account and designed appropriately, especially when processing very short pulses, such as is the case when igniting light sources.
  • WO 2006/084 440 A1 shows an ignition transformer core for a high-pressure discharge lamp, the ignition transformer core being designed in at least two parts so that the transformer core has at least one gap, the core being formed by a first and at least one second core component, each made of a ferromagnetic or ferrimagnetic material and by at least a gap are separated, wherein the first core component has a cylindrical portion on which the windings of the ignition transformer are arranged, and the core components are shaped such that the core apart from the at least one gap has a closed shape.
  • the aforementioned object is achieved by a high-voltage transformer which has a first winding with three or more turns.
  • the high-voltage transformer further comprises a second winding and a U-shaped core with a first leg and a second leg with a length of 40 mm or less. The first winding and the second winding are applied to the first leg.
  • the high-voltage transformer according to the invention has at least three turns in the primary winding, so that this creates a well-defined inductance set by structural measures, which can be relatively large compared to parasitic inductances that arise from supply lines. Hence this is Vibration behavior of the inductive component in a corresponding Electronic circuit, such as an ignition arrangement for lighting means, essentially determined by the transformer according to the invention itself and not by parasitic effects.
  • the first and the second winding are applied together on one leg of a U-shaped core, the length of which is 40 mm or less, so that in the longitudinal direction of the U-shaped core, despite the number of turns of 3 or larger results in a very compact structure.
  • the U-shaped core itself can be efficiently manufactured with high precision and is particularly advantageous in the manufacture of the entire transformer, since the first and second windings only have to be pushed onto the first leg without further assembly work for joining windings together and core are required.
  • tools for pressing and sintering the core material for a U-shaped core can be provided in the form of multiple molds, so that multiple cores can be manufactured in a single operation.
  • the first winding has exactly three turns.
  • the use of exactly three turns for the primary winding of the high-voltage transformer enables the transformer to be constructed with suitable inductance in order to reduce the influence of line inductances and at the same time to achieve suitable oscillation behavior, so that output pulses of the order of magnitude of 100 ns are achieved with the desired high output voltage will.
  • this structural design allows the secondary winding with relatively compact longitudinal dimensions, i.e. with a dimension along the magnetic longitudinal direction of the first leg, so that the aforementioned dimension of 40 mm or less can be achieved.
  • the U-shaped core is provided as a one-piece core material.
  • the term "integral" is to be understood to mean that the core material is provided as a single continuous piece of material in which the individual areas, i. the first leg, the second leg and a corresponding connecting piece are connected to one another without an additional connection process, for example gluing, etc., being required.
  • the term “in one piece” in this context describes a U-shaped core which is pressed as a whole. As already explained above, it is therefore possible to produce several U-shaped cores simultaneously in a single production process. Furthermore, when assembling the high voltage transformer, no further steps are required to process the magnetic core material.
  • winding sections of the first winding which are used to electrically connect turns of the first winding, are between the first leg and the second leg arranged. That is, these winding sections, which serve as a connecting line between individual turns, are arranged in the lateral direction of the U-shaped core between the first leg and the second leg of the U-shaped core. These connecting lines are thus effectively positioned between the legs, so that a certain mechanical protective effect is achieved through the second leg and the windings for the connecting lines applied to the first leg.
  • the dimension of at least the second leg in one of the two lateral directions can be significantly larger than in the corresponding other lateral direction, ie the cross-sectional shape is rectangular with a relatively small side length in one lateral direction and with a significantly larger side length in the other lateral direction, so that when the magnetic cross section of the second leg is required, there is a relatively large overlap of the connecting lines.
  • a cross section of the first leg perpendicular to the magnetic longitudinal direction is at least twice as large as a cross section of the second leg.
  • the first leg of the U-shaped core essentially acts like a rod core, which is enclosed by the first winding and the second winding, so that the effective magnetic cross-section of the first leg essentially determines the magnetic, mechanical and thermal properties of the transformer .
  • the second leg has a significantly smaller magnetic cross-section, but nevertheless makes a decisive contribution to the overall magnetic properties, in that the additional core material in the second leg contributes to a required size of the inductance or the Al value of the core.
  • the interaction of many parameters has to be taken into account in the construction of the transformer, whereby it is particularly important to realize that the AI value of the core material can be set to a desired value by the second leg, but still saturation of the Core material may take place in particular in the second leg.
  • the core material can be saturated during certain operating phases, whereas a higher AI value can cause effective damping in other operating phases, for example during the rise of the current, as long as the core is not yet saturated.
  • the unavoidable leakage inductance can be kept very small by the second leg of the U-shaped core, while on the other hand the spatial extent of the stray field can also be efficiently modeled by the geometry and the volume of the second leg.
  • the values for the leakage inductance can be reduced by structural measures to values that are suitable for the desired application, for example for an ignition transformer, while the influence of other parasitic effects, such as the inductance and capacitance of supply lines, etc., is reduced is.
  • the magnetic cross-section of the second leg is only half or significantly less compared to the magnetic cross-sectional area of the first leg, the distance between the first leg and the second leg can be reduced without affecting the space required for the first winding and the second winding is required, is restricted.
  • the legs of the U-shaped core, which run essentially in parallel, are spaced apart from one another which allows the first and second windings to be accommodated on the first leg without restriction when the transformer is being installed.
  • the smaller cross section of the second leg is realized by a smaller dimension in the direction of the distance between the first and second leg, so that when the cross-sectional area is required, there is an optimally large distance between the two legs to accommodate the windings.
  • the first leg and the second leg have essentially the same dimensions in a lateral direction and the different cross-sections are achieved by different dimensions in the lateral direction perpendicular thereto.
  • the cross section of the first leg has a dimension of 4 mm or less in the first lateral direction and a dimension of 9 mm or less in the lateral direction perpendicular thereto.
  • the cross section of the first leg can thus have a pronounced elongated rectangular shape, which makes it possible, with a given magnetic cross section, to reduce the structural volume in a lateral direction at the expense of increasing the structural volume in the lateral direction perpendicular thereto. This results in a high degree of flexibility when adapting the lateral dimensions of the High-voltage transformer on structural conditions, for example in a housing to accommodate ignition electronics, and the like.
  • the cross section of the first leg has a dimension of 8 mm or smaller in a first lateral direction and a dimension of 5 mm or smaller in the lateral direction perpendicular thereto.
  • a less pronounced rectangular shape can be realized if this is suitable for the overall lateral dimensions of the high-voltage transformer.
  • a larger surface can be provided, so that a higher thermal load can possibly be tolerated.
  • a dimension of the high-voltage transformer in a first lateral direction is 16 mm or less, this dimension is preferably between 16 mm and 13 mm, and in the lateral direction perpendicular thereto the dimension is 16 mm or less, preferably this dimension is between 16 mm and 13 mm.
  • the lateral dimensions of the high-voltage transformer are chosen so that the dimensions are approximately the same in both lateral directions, so that the installation with regard to the lateral direction is relatively independent of the orientation of the high-voltage transformer around its longitudinal axis.
  • the high-voltage transformer can be installed in a housing or on a printed circuit board in such a way that a rotation around the longitudinal axis by 90, 180 or 270 ° has essentially no effect on the entire construction volume, provided that connections of the high-voltage transformer are provided accordingly.
  • the connecting lines of the first winding are located in the space between the windings which are applied to the first leg and the second leg, as has already been explained above.
  • a dimension of the high-voltage transformer in a first lateral direction is 20 mm or less, preferably this dimension is between 19 mm and 17 mm, and in the lateral direction perpendicular thereto Direction, the dimension is 14 mm or less, this dimension is preferably between 13 mm and 11 mm.
  • an overall rectangular shape of the cross section can be provided, so that a suitable adaptation to the available structural volume is possible in the lateral directions.
  • the connecting lines of the first winding are preferably positioned above or below the first leg or rotated by 90 ° relative to it.
  • the longitudinal dimension of the high-voltage transformer is preferably essentially not influenced by a change in the lateral dimension.
  • the dimension in the longitudinal direction is 40 mm or less, and is preferably 36 mm or less. In special embodiments, the longitudinal dimension is between 33 mm and 36 mm.
  • the geometric parameters are selected as a function of other parameters in such a way that no further additional magnetic material is required for the core.
  • the production of the core material for an entire high-voltage transformer is considerably simplified, since, for example, several U-shaped cores can be produced in a common single work step.
  • the assembly of the high-voltage transformer is significantly simplified, since with regard to the core material no further work steps, such as the attachment of shielding elements, field guiding elements and the like, are required.
  • the essential parameters of the inductive and capacitive behavior of the high-voltage transformer are determined by design measures, for example by manufacturing the U-shaped core, so that a high degree of constancy is guaranteed in the manufacture of a large number of high-voltage transformers.
  • FIG. 12 schematically shows a perspective view of a high voltage transformer 100 according to an illustrative embodiment of the present invention.
  • the high-voltage transformer 100 which in illustrative embodiments transforms an input voltage of several 10 V to several 100 V to a relatively high output voltage in the range of several 100 V to several 10,000 V, is in particular Due to the compact design, it is suitable for mobile applications and applications in the motor vehicle sector and the like when relatively high output voltages are required.
  • the high-voltage transformer 100 can advantageously be used for igniting gas discharge lamps.
  • the high-voltage transformer 100 contains a U-shaped core 110 which comprises a first limb 112, a second limb 111 and a coupling part 113 connecting these two limbs.
  • the core 110 is provided as a "one-piece" piece of material which is manufactured in one operation together with further cores and does not require any further work steps when assembling the high-voltage transformer 100, such as attaching and securing further magnetic components and the like.
  • the core 110 thus forms a non-closed core material for the transformer 100, with no further magnetic components in the form of field guide plates, etc., being provided in particularly advantageous embodiments.
  • U-shaped core also includes any other geometry in which the coupling part 113 and the two legs 112 and 111 form a shape in which the first leg and the second leg are elongated and at least extend approximately in the same direction over a certain distance.
  • the rectangular shape shown in the figures can also have curves. That is, the first limb 112 and / or the second limb 111 and / or the coupling part 113 can have a cross-sectional shape other than a rectangular shape and / or edges can be rounded accordingly.
  • the individual components of the core 110 do not necessarily have to be straight components, but these can also have a curvature, provided this is compatible with the required structural volume.
  • the coupling part 113 may have an arcuate shape. In the advantageous embodiments shown, the rectilinear and rectangular structure of the individual components of the core 110 results in a small overall volume.
  • the length of the core 110 ie the extension of the core 110 in a longitudinal direction L, defines the total length of the high-voltage transformer 100 and is 40 mm or less.
  • Cross-sectional areas 112S and 111S of the two legs 112, 111 form rectangles in the embodiments shown and are of different sizes. That is, the cross-sectional area 112S is significantly larger than the cross-sectional area 111S and, in preferred embodiments, is approximately twice as large as the cross-sectional area 111S.
  • first lateral direction denoted by B1
  • second lateral direction perpendicular thereto denoted by B2
  • the first limb 112 and the second limb 111 therefore have relatively large surfaces for a given magnetic volume, as a result of which good thermal properties can be achieved.
  • the high voltage transformer 100 further includes a first winding 140 that includes three or more turns.
  • the first winding 140 contains exactly three turns 141, 142 and 143.
  • the turns 141,..., 143 are connected in series in the same direction by means of corresponding connecting pieces 145 or connecting lines.
  • the first winding 140 is connected to corresponding connection pins, for example by means of a connection line 144, which is routed at a precisely defined distance in relation to the other components of the transformer 100.
  • the high-voltage transformer 100 further comprises a second winding 120, which optionally has a suitable number of winding sections 121,..., 124, the number of winding sections typically depending on the number of turns of the first winding 140. In the arrangement shown, four winding sections are shown.
  • the first winding 140 and the second winding 120 are applied to a coil former 130, which in turn is pushed onto the first leg 112 of the core 110.
  • the coil former 130 automated work processes can be used for applying, in particular, the second winding 120, which is applied to the coil former 130 before the first winding 140 is produced.
  • the first winding 140 can comprise one or more conductor clips, which can have suitable connection pins etc., for example, in connection with a suitable wire which can also be used, for example, to produce the connecting lines 144 and / or 145.
  • the coil former 130 has corresponding recesses, which the conductor material of the Reliably separate turns 141,..., 143 in the longitudinal direction L from the conductor material of the second winding 120, so that sufficient insulation distances are created by structural measures.
  • corresponding recesses can be provided to accommodate the connecting line 144, for example, so that it is routed at a precise distance from the second winding 120 and the core 110, so that in this way a precisely defined geometry for the line routing when the transformer 100 is constructed can be adhered to.
  • FIG. 13 shows a sectional view of the transformer 100 when it is taken along the lateral direction B2 (see FIG Figure 1A ) is looked at.
  • the three turns of the first winding 140 and the connecting lines 144, 145 are also shown.
  • the first limb 112 and the second limb 111 have different dimensions along the lateral direction B1.
  • a dimension 112A for the first leg 112 is shown which is 5 mm or smaller in size.
  • the dimension 112A is between 3.5 mm and 4.5 mm.
  • the corresponding dimension 111A of the second leg 111 is significantly smaller and is 3 mm and smaller, preferably the size of the dimension 111A is in the range from 1.5 mm to 2.5 mm.
  • a length 101 of the entire high-voltage transformer 100 which is determined by the length of the core 110, is 40 mm or less, and preferably the length 101 is in the range of 32 mm to 36 mm.
  • the transformer 100 with the dimensions just specified can provide an output voltage during an ignition process of 30,000 V or more at an input voltage of 600 V to 1000 V. Furthermore, after the ignition of a gas discharge lamp, the operating current of the lamp is conducted via the second winding of the transformer.
  • FIG. 13 is a sectional view taken from the lateral direction B1 (see FIG Figure 1A ) is looked at.
  • the second leg 111 and the first leg 112 are shown schematically, which are preferably the same in the embodiment shown Have dimension along the lateral direction B2.
  • These dimensions, labeled 112B and 111B, are 9 mm or smaller and are preferably in the range between 6.5 mm and 7.5 mm.
  • the magnetic cross section 112S is significantly larger than the magnetic cross section 111S (see FIG Figure 1A ), since the second leg 111 essentially only serves as a return path for the magnetic field of the first leg 112 and thus for setting the total inductance of the core material.
  • the core material is already saturated in certain operating phases, so that the reduction in the magnetic cross section of the second leg 111 does not result in any restriction of the functionality of the transformer 100 in this regard.
  • the desired current-limiting effect of the transformer 100 can still be achieved in certain operating phases by a relatively high inductance, in that the second leg 111 provides a desired high inductance value.
  • the connecting lines 144, 145 are arranged between the first leg 112 and the second leg 111 along the lateral direction B1, that is, in the direction of the distance between the first leg and the second leg, so that in addition to a compact Construction also gives a mechanical protective function for the connecting lines 144, 145, especially if the transformer is filled with potting material after installation in a housing. This mechanical protective function is supported by the relatively large extent 111B along the lateral direction B2.
  • the overall dimensions along the first lateral direction B1 and along the second lateral direction B2, which are shown as 102 (see FIG Figure 1B ) and 103 (see Figure 1C ) are approximately the same and are in the range of 18 mm or smaller, preferably between 14 mm and 17 mm.
  • FIG. 8 shows a perspective view of the high voltage transformer according to FIG further embodiment 200 in which a U-shaped core 210 has a first leg 212 and a second leg 211.
  • the high-voltage transformer 200 further comprises a first winding 240 with three or more turns 241, ..., 243, preferably with exactly three turns, and a second winding 220, which can have several winding sections, for example four winding sections.
  • the dimension along a longitudinal direction L of the transformer 200 is essentially determined by the length of the core 210 and is 40 mm or less.
  • connecting lines 244, 245 of the first winding 240 are not provided between the legs 212, 211 along the direction B2, as is the case in the embodiment of FIG Figure 1 the case is. Rather, in the embodiment shown, the connecting lines 244, 245 are arranged laterally offset in relation to the first and second legs 212, 211 along the direction B1. In this way, a high degree of flexibility can be achieved in the final setting of the component size in the lateral directions B1 and B2, while the inductive and capacitive properties remain essentially unaffected.
  • FIG. 13 shows a sectional view of the transformer 200, viewed from the direction B1.
  • the U-shaped core 210 has the legs 212, 211 and a coupling part 213.
  • a dimension 212A of the leg 212 along the direction B2 is 8 mm or less, and preferably this dimension is in the range between 4.5 mm and 6.5 mm.
  • the corresponding dimension 211A is 4 mm or less, and in preferred embodiments is in a range between 2.5 mm and 3.5 mm.
  • the total length 201 of the transformer 200 which in turn is determined by the length of the core 210, is 40 mm or less and is preferably in a range between 32 mm and 36 mm. For the entire dimension 203 along the lateral direction B2, it applies that this is 20 mm or less and in preferred embodiments in a range between 13 mm and 17 mm.
  • FIG. 13 shows a sectional view of the transformer 200, viewed from the direction B2.
  • the dimensions 212B and 211B in the lateral direction B1 for the first leg 212 and second leg 211 are the same and are 8 mm or less. These dimensions are preferably in a range of 4.5 mm and 6.5 mm.
  • the lateral dimension 203 of the transformer 200 in the lateral direction B1 is 17 mm or less and is preferably between 13 mm and 15 mm.
  • FIG. 13 shows a perspective view of the high-voltage transformer according to a further embodiment 300 which is similar in its geometry to that in FIGS Figures 2 illustrated embodiment, but connecting lines and connections are rotated by 90 ° about a longitudinal direction L.
  • the transformer 300 contains a U-shaped core 310 with a first leg 312 and a second leg 311.
  • the high-voltage transformer 300 comprises a first winding 340 with three or more turns 341, ..., 343, preferably with exactly three turns, and a second winding 320, which can have several winding sections, for example four winding sections.
  • the dimension along the longitudinal direction L of the transformer 300 is essentially determined by the length of the core 310 and is 40 mm or less.
  • connecting lines 344, 345 of the first winding 340 are not provided between the legs along the direction B2, as is the case in the embodiment of FIG Figure 1 the case is. Rather, in the embodiment shown, the connecting lines 344, 345 are arranged along the direction B2 above (or below) the first leg 312 and thus rotated 180 ° around the longitudinal axis L compared to the transformer 100 or 90 ° compared to the transformer 200 . This allows a high degree of flexibility in the final setting of the component size in the lateral directions B1 and B2, while the inductive properties thereof remain essentially unaffected.
  • FIG. 13 shows a sectional view of the transformer 300, which is viewed from the direction B1.
  • the U-shaped core 310 has the legs 312, 311 and a coupling part 313.
  • a dimension 312A of the leg 312 along the direction B2 is 8 mm or less, and preferably this dimension is in the range between 4.5 mm and 7.5 mm.
  • the corresponding dimension 311A is 4 mm or less, and in preferred embodiments is in a range between 2.5 mm and 3.5 mm.
  • the total length 301 of the transformer 300 which in turn is determined by the length of the core 310, is 40 mm or less and is preferably in a range between 32 mm and 36 mm. For the entire dimension 303 along the lateral direction B2, it applies that this is 18 mm or less and, in preferred embodiments, is in a range between 14 mm and 16 mm.
  • FIG. 13 shows a sectional view of the transformer 300, viewed from the direction B2.
  • the dimensions 312B and 311B in the lateral direction B1 for the first leg 312 and second leg 311 are the same and are 7 mm or less. These dimensions are preferably in a range of 4 mm and 6 mm. For the entire dimension 302 along the lateral direction B1, it applies that this is 15 mm or less and, in preferred embodiments, is in a range between 11 mm and 13 mm.
  • the dimensions in the lateral directions B1 and B2 of the core and thus also of the entire transformer can be swapped or generally changed as required in order to take into account the specified lateral installation dimension in a special application.
  • the required inductive properties are retained.
  • the high-voltage transformer 100, 200 can be constructed with a small volume, with in particular typically the length, which is 40 mm or less, being well adapted to existing systems. Based on the U-shaped In essence, the values of the leakage inductance and the total inductance can be set in such a way that a pulse with a suitable length of time is generated, especially during the ignition process, and a current limitation is achieved in the further course when the discharge lamp starts up.
  • the use of three turns in the first winding leads to an inductive behavior of the transformer in such a way that further inductances, which are caused, for example, by connecting cables of the transformer to another electrical component, have a significantly lower influence on the overall behavior, so that the desired Vibration behavior is determined by structural measures of the transformer itself.
  • the use of the U-shaped core material reduces both the manufacturing cost of the core material itself and the cost of assembling the high voltage transformer.

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Claims (10)

  1. Transformateur à haute tension (100, 200) comportant:
    un premier enroulement (140, 240) avec trois tours ou plus (141, 142, 143 ; 241, 242, 243),
    un deuxième enroulement (120, 220) et
    un noyau (110, 210) formant un matériau de noyau non fermé pour le transformateur à haute tension (100, 200), dans lequel le noyau (110, 210) est un noyau en forme de U (110, 210) prévu comme matériau de noyau intégral ayant une première branche (112, 212) et une deuxième branche (111, 211) avec une longueur de 40 mm ou moins, le premier enroulement (140, 240) et le deuxième enroulement (120, 220) étant appliqués sur la première branche (112, 212),
    dans lequel le noyau (110, 210) est pressé dans son ensemble, et dans lequel aucun composant magnétique autre que le noyau en forme de U n'est prévu.
  2. Transformateur à haute tension selon la revendication 1, dans lequel le premier enroulement comporte trois tours (141, 142, 143 ; 241, 242, 243).
  3. Transformateur à haute tension selon l'une des revendications précédentes, dans lequel des parties d'enroulement (144, 145, 244, 245) du premier enroulement (140, 240), qui servent à connecter électriquement les enroulements du premier enroulement (140, 240), sont disposées entre la première branche (112, 212) et la deuxième branche (111, 211).
  4. Transformateur à haute tension selon l'une des revendications précédentes, dans lequel une section transversale (112S, 212S) de la première branche perpendiculaire à la direction magnétique longitudinale (L) est plus grande qu'une section transversale (111S, 211S) de la deuxième branche.
  5. Transformateur à haute tension selon la revendication 4, dans lequel la section transversale (112S) de la première branche a une dimension de 5 mm ou Klemer dans une première direction latérale (B1) et une dimension de 9 mm ou moins dans la direction latérale (B2) qui lui est perpendiculaire.
  6. Transformateur à haute tension selon la revendication 4, dans lequel la section transversale (212S) de la première branche a une dimension (212A, 212B) de 8 mm ou moins dans une première direction latérale (B2, B1) et une dimension (212B, 212A) de 8 mm ou moins dans la direction latérale (B1, B2) perpendiculaire à celle-ci.
  7. Transformateur à haute tension selon la revendication 4, dans lequel la section transversale (312S) de la première branche a une dimension (312A, 312B) de 8 mm ou moins dans une première direction latérale (B2, B1) et une dimension (312B, 312A) de 7 mm ou moins dans la direction latérale (B1, B2) perpendiculaire à celle-ci.
  8. Transformateur à haute tension selon l'une quelconque des revendications précédentes en relation avec la revendication 4, dans lequel une dimension du transformateur à haute tension est de 18 mm ou moins, de préférence entre 17 mm et 14 mm, dans une première direction latérale (B1) et de 18 mm ou moins, de préférence entre 17 mm et 14 mm, dans la direction latérale (B2) perpendiculaire à celle-ci.
  9. Transformateur à haute tension selon l'une quelconque des revendications précédentes, dans lequel une dimension (203, 202) du transformateur à haute tension est de 20 mm ou moinsdans une première direction latérale (B1, B2) et de 16 mm ou moins dans la direction latérale (B1, B2) perpendiculaire à celle-ci.
  10. Transformateur à haute tension selon l'une quelconque des revendications 1 à 7, dans lequel une dimension (303, 302) du Transformateur à haute tension est de 18 mm ou moins dans une première direction latérale (B1, B2) et de 15 mm ou moins dans la direction latérale perpendiculaire à celle-ci (B1, B2).
EP15747469.3A 2014-11-28 2015-08-04 Transformateur à haute tension avec noyau en forme de u Active EP3224841B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014224331.9A DE102014224331A1 (de) 2014-11-28 2014-11-28 Hochspannungstransformator mit U-förmigem Kern
PCT/EP2015/067960 WO2016082944A1 (fr) 2014-11-28 2015-08-04 Transformateur à haute tension avec noyau en forme de u

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EP3224841B1 true EP3224841B1 (fr) 2020-12-02

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CN108597791A (zh) * 2018-02-23 2018-09-28 上海圣缑电磁设备有限公司 电抗器及其制造方法

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US2867785A (en) * 1953-03-06 1959-01-06 Ranza A Crumbliss Ignition coil
DE9417708U1 (de) * 1994-11-04 1996-02-29 Tridonic Bauelemente Ges.M.B.H., Dornbirn Filterdrossel
DE102004055154B4 (de) * 2003-12-23 2007-10-18 Sew-Eurodrive Gmbh & Co. Kg Verfahren zum Betrieb eines Systems zur berührungslosen Energieübertragung, System zur berührungslosen Energieübertragung und Übertragerkopf
DE102005029001A1 (de) * 2005-02-11 2006-08-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Lampensockel für eine Hochdruckentladungslampe und Hochdrucksentladungslampe
KR100843446B1 (ko) * 2007-03-21 2008-07-03 삼성전기주식회사 집적형 트랜스포머
DE102007025421B4 (de) * 2007-05-31 2009-07-30 Vogt Electronic Components Gmbh Zündtransformator und Zündmodul
DE102007049235A1 (de) * 2007-10-10 2009-04-16 Siemens Ag Anordnung zur induktiven Übertragung von elektrischer Energie
DE202011051721U1 (de) * 2011-10-21 2011-11-07 SUMIDA Components & Modules GmbH Hochspannungstransformator und bewickelter Spulenkörper für Zündmodule mit Anschlussstiften als Bestandteil der Primärwicklung
DE102013200265A1 (de) * 2013-01-10 2014-07-10 SUMIDA Components & Modules GmbH Kleintransformator für hohe Ausgangsspannungen

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EP3224841A1 (fr) 2017-10-04
DE102014224331A1 (de) 2016-06-02

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